What is the correct definition of WSDL port element?

Related questions

1. What is enumeration in XSD?
2. What is the most useless element?
3. What is XSD extension?
4. What is XSLT example?
5. What does Xs mean in XML?
6. What is restriction base in XSD?
7. What is XSD format?
8. What is annotation in XSD?
9. How are XSD files used?
10. What is simple type in XSD?

Tags

1. #refers
2. #rules
3. #within
4. #element
5. #specify
6. #using
7. #address
8. #elements
9. #linking
10. #provides
11. #information
12. #extensibility
13. #unique
14. #attribute
15. #among
16. #defined
17. #ports
18. #enclosing
19. #binding
20. #document